Rehe (热河 or 熱河 pinyin: re4 he2, lit. hot river), also known as Jehol, is a defunct Chineseprovince that used to consist of part of today Hebei Province, Shanxi Province and Inner Mongolia.
... 45 to 64, and 9.6% who are 65 years of age or older. The median age is 35 years. For every 100 females there are 96.9 males. For every 100 females age 18 and over, ...